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Medical laser used for cutting and boring operation

A laser and surgery technology, applied in the field of lasers, can solve problems such as affecting the promotion of new laser applications, difficult to control thermal damage and acoustic damage, and damage to thin-walled organs.

Inactive Publication Date: 2003-02-19
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive carbonization affects incision healing; thermal injury and acoustic injury are difficult to control, either difficult to stop bleeding, or cause damage to thin-walled organs; it is difficult to achieve the expected curative effect, which affects the new application of laser in medical treatment and clinical promotion

Method used

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  • Medical laser used for cutting and boring operation
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Embodiment Construction

[0008] The present invention is described in detail below in conjunction with accompanying drawing.

[0009] As can be seen from the drawings, the present invention adopts modulation technology or Q-switching technology to modulate the continuous wave or pulse wave laser beam into a series of small pulse trains, and the repetition frequency is 1KHz--20KHz. At the same time the individual pulses of these small pulse trains have a power density F c =ALρτ B K C

[0010] In the formula: A.B.C is a constant, which varies with various biological tissues,

[0011] L is the latent heat of vaporization of biological tissue,

[0012] K is the thermal conductivity of biological tissue,

[0013] ρ is the density of biological tissue,

[0014] τ is the irradiation time, so that the temperature rise of the biological tissue can be directly sublimated from the body temperature to the vaporized state without producing carbonized products. At the same time, there a...

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Abstract

The medical laser includes modulating crystal with both the function of total reflecting mirror and the function of modulating Q, output mirror, laser medium and laser power supply connected to the laser medium. It adopts pulse laser beam with modulation frequency of 1K-20KHz. The present invention modifies the beam character of the laser into one with direct vaporization function so that no carbide is produced in the laser radiation part and the sizes of thermal damage area and acoustic damage area may be controlled. The present invention is especially suitable for the operation in body's heart and other important organs.

Description

technical field [0001] The invention belongs to lasers, in particular to lasers used for surgical treatment of cutting and drilling of living bodies. Background technique [0002] Lasers have been widely used in hospitals as surgical instruments, but in some special operations, such as cutting or drilling with lasers on the myocardium, carbonization, thermal damage areas, and acoustic damage areas are formed near the laser irradiation site. Excessive carbonization affects incision healing; thermal injury and acoustic injury are difficult to control, either difficult to stop bleeding, or cause damage to thin-walled organs; it is difficult to achieve the expected curative effect, which affects the new application of laser in medical treatment and clinical promotion. Contents of the invention [0003] The object of the present invention is to propose a laser with no carbonization at the laser irradiation site and less thermal and acoustic damage. [0004] The main feature of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/32A61B18/22
Inventor 葛霁
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI